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<td class="pageTitle" nowrap="true">Checklist: 参与者</td><td width="100%">
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<td valign="top">此核对表有助于确保所有的参与者都已标识并正确建模。</td>
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<div class="sectionHeading">Relationships</div>
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<div class="sectionHeading">Main Description</div>
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<td class="sectionTableSingleCell"><a id="XE_checkpoints__for_actors" key="检查点（checkpoints）" text="参与者的检查点" name="XE_checkpoints__for_actors" class="index"></a>&nbsp;<br />
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<div class="sectionHeading">Check Items</div>
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<div class="stepHeading"> 您已经找到所有参与者了吗</div>
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<td>也就是说，您已经说明并构建了系统环境中的所有角色的模型了吗？虽然您应该检查这一点，但是也要在找到并描述了所有的用例后才能确定。</td>
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<div class="stepHeading"> 每个参与者至少与一个用例相关吗</div>
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<td>删除用例说明中没有提到的任何参与者，或者删除与用例没有通信关联的任何参与者。但是，用例说明中提到的参与者可能与该特定用例有通信关联。</td>
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<div class="stepHeading"> 您能指定至少两个能充当特定参与者角色的人吗</div>
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<td>如果不能，请检查参与者建模的角色是不是另一个角色的一部分。如果是，就应该将该参与者与另一个参与者合并起来。</td>
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<div class="stepHeading"> 有没有多个参与者执行与系统相关的类似角色</div>
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<td>如果有，就应该将这些参与者合并成一个参与者。通信关联和用例说明显示参与者和系统如何关联。</td>
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<div class="stepHeading"> 有两个参与者扮演与用例相关的相同角色吗</div>
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<td>如果有，就应该用参与者泛化关系来构建他们共享的行为的模型。</td>
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<div class="stepHeading"> 特定参与者是否将用多种（完全不同）方法使用系统，或者他使用用例是否有多个（完全不同）的目的</div>
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<td>如果是，您就很可能要有多个参与者。</td>
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<div class="stepHeading"> 参与者有直观的描述性名称吗</div>
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<td>用户和客户都能理解这些名称吗？参与者的名称与他们的角色对应，这一点很重要。如果不对应，请更改名称。</td>
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